<template>
  <h2>当前的求和为：{{ sum }}</h2>
  <button @click="sum++">点我+1</button>
  <hr>
  <h2>当前的信息为:{{ msg }}</h2>
  <button @click="msg+='!'">修改信息</button>
  <hr>
  <h2>姓名：{{ person.name }}</h2>
  <h2>年龄：{{ person.age }}</h2>
  <h2>薪资：{{ person.job.j1.salary + "K" }}</h2>
  <button @click="person.name+='~'">修改姓名</button>
  <button @click="person.age++">增长年龄</button>
  <button @click="person.job.j1.salary++">涨薪</button>
</template>

<script>
import {ref, reactive, watchEffect} from "vue";

export default {
  name: "Demo",
  setup() {
    let sum = ref(0)
    let msg = ref('你好啊')

    let person = reactive({
      name: '张三',
      age: 18,
      job: {
        j1: {
          salary: 20
        }
      }
    })

    watchEffect(() => {
      const x1 = sum.value
      const x2 = person.job.j1.salary.value
      console.log('watchEffect所指定的回调执行了')
    })

    return {
      sum,
      msg,
      person
    }
  }
}
</script>
